dsh-duizhang

Reconciling bank statements, platform ledgers, and batches of invoice PDFs is one of the most draining parts of any finance workflow. dsh-duizhang breaks that chain into 15 ready-to-call tools: extracting clean transaction tables from PDFs, comparing two sets of books in integer cents, matching rows without a shared key by amount, date window, and fuzzy counterparty names, handling 1:N split and N:1 combined payments, and deduplicating supplier entities with tax-ID checksum validation — all in one pass.

Its guiding principle is that it refuses to look right when it is wrong. reconcile_ledger operates exclusively in integer cents so 0.1 + 0.2 never invents a phantom difference; extract_statement independently re-adds opening plus credits minus debits and, if the total does not balance, names the exact row where it first breaks; match_transactions declines to guess when the evidence is thin; dedupe_entities shows the cross-checked evidence and leaves the merge decision to a human.

The toolset is well suited to finance and operations teams at small and mid-size companies, independent accountants, founders keeping their own books, and anyone who regularly handles Chinese bank statements, VAT invoices, and Excel workpapers. All documents are processed in memory only and never retained, and a free anonymous quota is available without signup.